1 files changed, 1 insertions, 1 deletions
diff --git a/tmux.h b/tmux.h
index e697b9f8..a112e7df 100644
--- a/tmux.h
+++ b/tmux.h
@@ -599,7 +599,7 @@ struct mode_key_table {
 #define MODE_MOUSE_STANDARD 0x20
 #define MODE_MOUSE_BUTTON 0x40
 #define MODE_BLINKING 0x80
-/* 0x100 unused */
+#define MODE_MOUSE_UTF8 0x100
 #define MODE_MOUSE_SGR 0x200
 #define MODE_BRACKETPASTE 0x400
 #define MODE_FOCUSON 0x800